|General properties||Unit||iglidur® L500||Testing method|
|Max. moisture absorption at 23 °C / 50% r.h.||% weight||0,1||DIN 53495|
|Max. water absorption||% weight||0,3|
|Coefficient of surface friction, dynamic, against steel||µ||0,19 - 0,26|
|pv value, max. (dry)||MPa x m/s||4,0|
|Modulus of elasticity||MPa||12.015||DIN 53457|
|Flexural strength at 20 °C||MPa||201||DIN 53452|
|Recommended max. surface pressure (20 °C)||MPa||70|
|Shore-D hardness||81||DIN 53505|
Physical and thermal properties
|Max. long-term application temperature||°C||+250|
|Max. short-term application temperature||°C||+315|
|Lower application temperature||°C||-100|
|Heat conductivity||[W/m x K]||0,45||ASTM C 177|
|Coefficient of thermal expansion (at 23 °C)||[K-1 x 10-5]||6||DIN 53752|
|Specific contact resistance||Ωcm||> 1010||DIN IEC 93|
|Surface resistance||Ω||> 1012||DIN 53482|
The very low moisture absorption of 0.1% by weight in a normal climate and 0.3% by weight at maximum water absorption also enables continuous operation in high humidity or in liquid media.
With increasing temperatures, the compressive strength of iglidur® L500 plain bearings decreases. The diagram 02 shows this inverse relationship. The recommended maximum surface pressure is a mechanical material parameter. No conclusions regarding the tribological properties can be drawn from this.
Diagram 03 shows the elastic deformation of iglidur® L500 at radial load. At the recommended maximum surface pressure of 70 MPa the deformation is less than 2.5 % at room temperature. Plastic deformation can be negligible up to this value. It is however also dependent on the duty cycle of the load.
iglidur® L500 has been developed especially for high surface speeds with low loads. Due to the high temperature-resistance of iglidur® L500, the physical limit created from heating of the bearing has been increased significantly. In addition, the extremely low wear allows the high acceleration speeds to be reached and maintained. The maximum speeds are shown in table 03.
|C. o. f. µ||0,08 - 0,15||0,09||0,04||0,04|
The excellent coefficient of friction level of iglidur® L500 in dry operation once again decreases considerably with speed. Diagram 04 shows this with respect to a steel shaft. As the load increases, the coefficient of friction decreases, especially in the range up to 20 MPa (Diagram 05).
|Greases, oils without additives||+|
iglidur® L500 bearings are resistant to radiation up to a radiation intensity of 3 · 102 Gy. Higher radiation weakens the material and may result in a significant decrease in mechanical properties.
UV resistance The material properties of iglidur® L500 bearings do not change under UV rays or other weathering influences.
VacuumIn vacuum, moisture is released as a vapour. Due to its low absorption of water, however, use in a vacuum is possible.
|to 3||0 - 0,025||+0,006 +0,046||0 +0,010|
|> 3 bis 6||0 - 0,030||+0,010 +0,058||0 +0,012|
|> 6 bis 10||0 - 0,036||+0,013 +0,071||0 +0,015|
|> 10 bis 18||0 - 0,043||+0,016 +0,086||0 +0,018|
|> 18 bis 30||0 - 0,052||+0,020 +0,104||0 +0,021|
iglidur® L500 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for pressfit into a housing machined to a H7 tolerance. After being assembled into a nominal size housing, the inner diameter automatically adjusts to the F10 tolerances. For particular dimensions the tolerance differs depending on the wall thickness (please see product range table).